I think I read somewhere that they need magnesium. In order for them to thrive "in captivity" you need to supplement with magnesium. Not sure what effect that would have on the fish though. I would definitely like to see a pic though cause I've been thinking about doing the same with my brackish tank.
oh, duh, I mentioned the magnesium thing in a post above...
oh, duh, I mentioned the magnesium thing in a post above...